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Magnetic Information Recording Medium

Publishing Venue

IBM

Related People

Rausch, F: AUTHOR

Abstract

The recording medium is in the form of a small tube having approximately the dimensions of a cigarette. Tube 1 consists of metal. Its surface is coated with a magnetizable oxide layer. Both ends are provided with spacer rings 2 for protecting the magnetic layer and the information stored on it during the processing operation.

Country

United States

Language

English (United States)

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Magnetic Information Recording Medium

The recording medium is in the form of a small tube having approximately
the dimensions of a cigarette. Tube 1 consists of metal. Its surface is coated
with a magnetizable oxide layer. Both ends are provided with spacer rings 2 for
protecting the magnetic layer and the information stored on it during the
processing operation.

The tube is provided with annular magnetic tracks each having a capacity of
eighty 8-bit characters. Such corresponds to the information storing capacity of
an IBM punched card having twelve rows and eighty columns. Each tube
contains a total of one hundred magnetic tracks.

The tubes can be processed individually. Alternatively, several, e. g., five
tubes, can be combined in cartridge 3. Such cartridge 3 thus corresponds to a
stack of 500 punched cards. The tubes are journaled in the side walls of
cartridge 3. The front wall of cartridge 3 is provided with slots 4 within which
magnetic head 5 slides from track to track along the magnetic layer for writing or
reading the stored information.

In a processing station, the tubes of a cartridge have both ends engaged with
conical drive wheels 6 and 7 by which they are caused to rotate. Mounted on the
drive shaft is disk 8 for producing the timing pulses. By spindle 9 or another
mechanism causing the same action, the magnetic head is advanced step by
step from one track to the next one. If required, each track can be read out
repeatedly or written into anew.